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Unrest) STATES Parser? Gretna.

ARNO Bl'lllPt, OF CHICAGO, IIJAINOI;

METHOD OF MAKlNG STARCH AND CATTLE-F000- SPECIFICATION forming part of Letters Patent No. 491,234, dated February 7, 1893- Application file-'l Gctuber 28, 1892. Serial No. 456.266. We specimens.) 7

To all whom it may concern.-

lie it known that I, ARNO BEER, of Chicago, Illinois. have lllVQl'llOlTE-Gllflll'l. Improvements in .lly-Irndacls Resulting from the Manufacture of S arcli from Indian Corn, of which the following is a specification.

In the manufacture of starch rom Indian corn, the first step consists in steeping the corn in a weal: solution of sulphurous acid in water for the purpose of softening the corn preparatory-t0 grinding. Having been thus softened the corn is ground and mixed with water. The hulls'and germs are separated from the liquid thus formed, which is known as starch mill; and which is caused to flow over slightly inclined tables upon which the starch-settles while the glute is ca ied ed by the liquid which flows from the lower end of the starch table.

Various methods are employed for saving the gluten thus discharged from the starch tables, but the steeping water of the corn has heretofcre bccn thrown away as waste.

The present invention is based upon the observation that during the steeping operation considerable proportions of the natural constituents of the corn become dissolved and hence have heretofore been wasted. The soluble material thus heretofore wasted consists of albuminoids, sugar and other hydrocarbons, phosphates, and potassium salts which are valuable for cattle food. The attemptto obtain these substances in a dry and concentrated form by evaporation oithe water in which they are dissolved, is frustrated by the. nature of the mass which remains after most of the water has been evaporated; this B12155 forming a viscous sirup which cannot he reduced to complete dryness without undergoing chemical changes, and which even when dry is hygroscop c and becomes sticky and deliquesoent from access of moist air. It is also to be observed that certain byproducts of the same process which remain after the starch has been separated and which are used as cattle food. are deficient in those soluole constituent s of corn which have been remove" in. the process of steeping and grinding. Tina; lay-products are known as corn bran, gl ten meal and maize feed, which is a mixture of the first two named materials. In the aggr gate they represent the residue of In particular, corn bran is that part of the corn which remains on a fine screen when the corn, after grindin", is washed with water" a a I n I over such a screen. The said residue 15 me pared for use by being pressed and dried. Gluten meal is extracted from that part of the corn which haspassed through the line screen and from-which the starch has been separated by settlement. It is collected in filter presses, dried and ground. NowI have found, when the steeping water is concentratcdto the consistency of a sirup, and is then mixed in a suitable proportion with an absorbent consisting of either or both of the said hy-prmlncts that the mixture can he completelydried in an ordinary drying apparatus and does not become moist or sticky when it is exposed to the air, at the same time the said by-prodncts or feed stuffs receive back a proportion of the soluble const t uents of corn which were heretofore lost in the ordinary process of manufactnringstarch and therefore their feeding value is considerably increased.

The present improvement is carried out as follows: The steeping wnteris obta ned in the ordinary way by immersing coruiu a dilute watery solution of sulphurous acid of a.

slightly elevated temperature and allowing it to remain therein until it is thoroughly softened. This steeping water, when withdrawn fromthecorn,contains,besidesthesolublcconstituents of corn, small amounts of sulphites and free snlphurous acid. Owing to their .taste the presence-0f these latter substances is objectionable in cattle food and I have therefore devised. means to remove them. I ascertain bychemical test the total amount of sulphurous acid present in a given quantity of stecpingwater and addtheretc. theclieinn rally equivalent amount of sulphuric ornthcr strong acid. For example, for one hundred pounds of sulphurons acid (S05) contained in a. tank full of steeping water I add one hundred'and sixty four pounds of sulphuric acid of 56 llaum density. Or I add the charmcally equivalent amount of hydrochloric or other strong acids,-using in place of one nundred p unds of sulphurous acid (30 two hundred and thirty pounds of hydrochloric pliances, such, for example, as aserew eona some;

acid of 20 Baum densi y. 'ihc-r-llect cl" such addition of sulphuric r other strong acid is that the sulpbnrous acid is set free and, 1uring the subsequent evaporation, is. carried away with the steam, while the added. acid combines with the basic sub tances with which the snlphurous acid was previously combined and forms salts which are free. of the objectionable properties of the sulphites.

It may be found in some cases that it is not required 'to add the fullftheoretieally equivalent; quantity of sulphuric or other acids to effect the desired result, viz, the expulsion of the sulphurons acid and if, upon chemical examinatidn, it is found that. a smaller amount is sufiicient, such number amount will of course be used; but in no case should the theoretically equivnlcn t. amount be exceeded. Itheu eviipo rnte tin; ste ping water-in any suitable evaporating apparatm; until it is conceutrated to a. six-up containing from fort to fifty per cenhof solid lllftl'fiilai. With lizi= sirup I mix either d y or partly dried corn bran, gluten meal or bo smin such proportion as it is desired to enrich the latter with the soluble material contained in the steeping water. For example, if it be desired to prodm a'dry roductn coutsining, say, ninety parts of dry gluten meal and ten parts of dry material from the sit-up, one hundred parts of gluten meal containing, say, ninety per cent. of solid material will twenty parts of sirnp containing, say, fifty per cent. of solid material. This mixture may be effected either manually or by means of any of the well known forms of mixing a-p-- yeyer into which the glutenmeal and sirup are introduced continuously in prescribed relative proportions. The resulting mixture iadried in anysuitabledryingapparatus, such arr-is c mmonlyused for drying granular sub ntances, and when dried may, if desired, be nduced to the-form of meal by grinding or be mixed with meal. I

otherwise. In any case the dried mixture is a znerohlmtable product adapted for use as cattle food.

I claim as my invention- 3.. The herein described method of treating Indian corn for the manufacture therefrom of starch and'o'i n. rich cattle feed; which consists in first steeping the corn in a watery solution of sulphur-nus acid, than removing the corn and grinding and mixing it; with water and separating and collecting the starch, corn bran and gluten from the resulting mixture by the ordinary methods; secondly, adding to the sleeping water, after the corn has been removed therefrom, an amount of strong acid, such as sulphuric acid, which is chemically equivalent to the amount of sulphurous acid present in the steep? ,ng wuter, then evaporating the greater part of the steeping water, then forming a mixture of the resulting condensed liquid with an absorbent such'as corn branfor gluten meal, or both corn bran and gluten meal, and in finally drying the resulting mixture.

2. A52. byproduct of the manufacture of starch from Indian com. a meal in dry form suitable for cattle food, composed of certain nutritive ingredients consisting of the albuurhnhgdmtes, phosphates and potassium seltq obtained from the irate!" in which the corn has been soaked, and an absorbent. s

3. As a. by-product 'of. the manufactured starch from Indian corn, a meal in dry form suitable for cattle food, composed ofcertain nutritiue-iugredieuts consisting of the albuminoids, sugar, carbohydrates, phosphates and potassium salts obtained from the water in which thecorn has beensoaked,and gluten qfiinuo nnnB.

J Witnesses:

HERMAN-C. Runs, Wm. Gamma. 

